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The difference between brushless water pump and brush water pump

Published:2020-12-08

brushless water pump

Definition of brushed motor:

DC motors are known for their good starting performance, speed regulation performance and other advantages. Among them, brushed DC motors belonging to the DC motor category use mechanical commutators, making the driving method simple. The motor is mainly composed of a stator made of permanent magnet materials, a rotor (armature) with coil windings, a commutator and brushes. As long as a certain amount of DC current is applied to both ends of the brushes A and B, the commutator of the motor will automatically change the direction of the magnetic field of the motor rotor, so that the rotor of the DC motor will continue to run.


brushless water pump


Definition of brushless DC pump:

The brushless DC water pump replaces the mechanical commutator with an electronic commutator, so the brushless DC water pump not only has the characteristics of good speed control performance of the DC motor, but also has the simple structure of the AC motor, no commutation spark, reliable operation and easy maintenance Etc.

The brushless DC water pump is mainly composed of a rotor made of permanent magnet materials, a stator with coil windings and a position sensor (optional). It can be seen that it has a lot in common with a DC motor. The structure of the stator and the rotor are similar (the original stator becomes the rotor, and the rotor becomes the stator), and the winding connections are basically the same. However, they have an obvious difference in structure: the brushless DC pump does not have the commutator and brushes in the DC motor, instead it is a position sensor. In this way, the motor structure is relatively simple, which reduces the cost of manufacturing and maintenance of the motor, but the brushless DC pump cannot automatically commutate (phase), and the sacrifice is the increase in the cost of the motor controller (such as the same three-phase DC motor, there are The drive bridge of the brushed DC motor needs 4 power tubes, and the drive bridge of the brushless DC motor needs 6 power tubes).


The difference between brushless water pump and brush water pump:


The difference between the brushless DC water pump and the traditional brush water pump is mainly the difference in structure, and therefore there are differences in life, cost, and use. The brushed water pump has carbon brushes, which will wear out during use, so the service life is short and the price is low. The brushless water pump has no carbon brush, and has a relatively long life and high cost.


In terms of driving mode, although both brushless water pumps and brushed water pumps are electric water pumps, the brushless DC water pumps are driven by brushless DC motors, and the brushed water pumps are driven by brushed motors. By default, it is a brushed DC water pump. Said tradition has a brush water pump.


The difference between brushless DC water pump and motor type water pump:


The difference between the brushless DC water pump and the motor-type water pump is the motor plus the pump body, which can be understood as a split structure. The brushless DC water pump is an integral structure, the driver is inside the pump, and the airtightness is good. In addition, water pumps have different classification methods at different levels.


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